1/* 2 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28/* 29 * @OSF_COPYRIGHT@ 30 */ 31/* 32 * Copyright (c) 1990, 1991 The University of Utah and 33 * the Center for Software Science at the University of Utah (CSS). 34 * All rights reserved. 35 * 36 * Permission to use, copy, modify and distribute this software is hereby 37 * granted provided that (1) source code retains these copyright, permission, 38 * and disclaimer notices, and (2) redistributions including binaries 39 * reproduce the notices in supporting documentation, and (3) all advertising 40 * materials mentioning features or use of this software display the following 41 * acknowledgement: ``This product includes software developed by the Center 42 * for Software Science at the University of Utah.'' 43 * 44 * THE UNIVERSITY OF UTAH AND CSS ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS 45 * IS" CONDITION. THE UNIVERSITY OF UTAH AND CSS DISCLAIM ANY LIABILITY OF 46 * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 47 * 48 * CSS requests users of this software to return to css-dist@cs.utah.edu any 49 * improvements that they make and grant CSS redistribution rights. 50 * 51 * Utah $Hdr: machparam.h 1.7 92/05/22$ 52 */ 53 54#ifndef _PPC_MACHPARAM_H_ 55#define _PPC_MACHPARAM_H_ 56 57/* 58 * Machine dependent constants for ppc. 59 * Added as needed (for device drivers). 60 */ 61#define NBPG 4096 /* bytes/page */ 62#define PGSHIFT 12 /* LOG2(NBPG) */ 63 64#define DEV_BSHIFT 10 /* log2(DEV_BSIZE) */ 65 66/* 67 * Disk devices do all IO in 1024-byte blocks. 68 */ 69#define DEV_BSIZE 1024 70 71#define btop(x) ((x)>>PGSHIFT) 72#define ptob(x) ((x)<<PGSHIFT) 73 74/* Clicks to disk blocks */ 75#define ctod(x) ((x)<<(PGSHIFT-DEV_BSHIFT)) 76 77/* Disk blocks to clicks */ 78#define dtoc(x) ((x)>>(PGSHIFT-DEV_BSHIFT)) 79 80/* clicks to bytes */ 81#define ctob(x) ((x)<<PGSHIFT) 82 83/* bytes to clicks */ 84#define btoc(x) (((unsigned)(x)+(NBPG-1))>>PGSHIFT) 85 86#endif /* _PPC_MACHPARAM_H_ */ 87